‏اللباس والزينة‏ : Hadeeth No:5208 Abu Huraira reported that Allaah's Prophet (sallAllaahu alayhi wa sallam) forbade the wearing of gold signet ring....

‏فضائل الصحابة‏ : Hadeeth No:5948 Anas reported that the people of Yemen came to Allaah's Messenger (sallAllaahu alayhi wa sallam) and said: Send with us a person who should teach us Sunnah and al-Islam, whereupon he (the Prophet) caught hold of the hand of Ubaida and said: He is a man of trust of this Umma....